We have a ~11 year old Thermador, Convection, Self-cleaning, Double Wall Oven, Model CT227, Serial number 95110119. When we cleaned the Upper Oven following the directions printed in the "Care and Use Manual", it seemed to work well. The next day, the upper oven, on bake or broil, does not get hot although the fan appears to work. There is minimal heat as demonstrated by touching the elements, but the upper oven never gets close to baking / broil temperature. The lower oven works fine. Is there a part or two that we need to replace?
The control switch may be bad on it. If there are 2 elements on the top, they both are not bad at the same time.Check to see if the wires have not burned off the control switch first. Check to see if your breakers are O.K. Turn them both(maybe 3) off and then reset.
Both Elements work perfectly in the broil mode and will heat to 500 degrees. In the Bake Mode temp is automatically set to 350 and oven goes into preheat mode. I watch the elements through the glass and the U shape element turns red and stays red but the zigzag center element will turn red and then immediately cool then red again and cool again over and over until about 326 degrees when both elements go off and never come back on even though they should since oven is obviously cooling down. I'm not sure where the control switch is. I have cycled the breakers because had to turn off power to put in new temperature sensor which had zero effect. Erratic behavior of the center element going on and off and U element staying red until about 326 then goes off. Then temperature display continues going up to 350, gives the tone that preheat has finished. But neither element will ever come on again unless I select the off button and start the Bake process all over again at which time it shows me the current oven temperature as it goes back into the preHeat mode. Thank you for trying to help me.
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